Sandpapering-head



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UNITED STATES PATENT OFFICE.

JOSEPH FELIX RODGERS AND LUCAS JOHN GREGOR, OF PITTSBURG, PENNSYLVANIA.

SANDPAPERlNG-HEAD.

SPECIFICATION forming part of Letters Patent No. 449,950, dated 'April7, 1891.

Application tiled August '7, 1890.

To @ZZ whom t may concern:

Be it known that we, JOSEPH FELIX Rona- Ens and LUCAS JOHN GREGOR,citizens of the United States, residing at Pittsburg, in the count-y ofAllegheny and State of Pennsylvania, have invented certain new anduseful Improvements in Sandpapering-Heads; and we do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains to'make and use the same.

This invention relates to Wood working machines, being especiallydesigned as an improvement on machines for sandpapering raisedpanel-work.

The object of the invention is to improve the general construction otthis class of machines and increase their efficiency and usefulness.

The improvement consists of the novel features and the peculiarconstruction and combination of the parts, which will be hereinaftermore fully described and claimed, and which are shown in theaccompanying drawings, in which- Figure l is a front view of the head orupper portion of a machine embodying our invention. Fig. 2 is an endview of one-hali` of the machine, showing the work-rest in section. Fig.3 is an end View of the bracket and the adjustable bearing thereon. Fig.4-

is a central cross-section of the sandpaperinghead on a large scale.Fig. 5 is a front view of the clamping-ring. Fig. 6 is a cross-sectionof two differently-formed blocks, showing their relative position toeach other and to the work and the work-rest.

The bed of the machine is indicated by D, and A and A' are two bracketsvertically adjustable with reference to the bed D, being adjusted by thescrews F and F', respectively, that are operated by the cranks f and f',which are applied to their upper ends. The spindles C and B arejournaled in suitable bearings M and M', provided on the brackets A andA'. The bearings M are Serial No. 861,295. (No model.)

xedly secured to the bracket A', whereas the bearing M is adjustable onthe bracket A, being adjusted by the set-screw K, which passes throughthe bent end of the base fm and screws into the bracket A. Each of thespindles is provided with band-pulleys E, around which belts (not shown)pass to impart motion to the said spindles C and B.

YEach of the sandpapering-heads G and G is similarly constructed, beingcomposed of plate H, block I, clamping-ring J, and means, as the boltsK, for clamping the ring .I and block I to the plate I-I. The plate H iscentrally recessed to receive the block I and hold it from lateraldisplacement. The clampingring has an inwardly-projecting flange jtooverlap a portion of the block I and obtain a purchase thereon. Theplate H is adapted to screw on the spindle. The blocks I may be ofdifferent patterns to suit the required n Work, and are constructed tobe readily interchangeable with each other. The abrading-sheet b isstretched over the block I and its edges are clamped between the ring .Iand the plate H by means of the bolts K. The plate O, arranged betweenthe head and supported at its ends on the brackets m' m', which aresecured to the frame of the machine, forms a rest for the work, and -isadjustable vertically to suit the nature of the Work by the set-screws'n n. (See Fig. 2.)

In practice the work to be sandpapered is inserted between the revolvingheads G G, which are spaced the proper distance apart by moving thespindle C outward.

Having thus described our invention, what we claim, and desire to secureby Letters Patent, is

The hereinbefore-specied sandpaperingmachine, comprising the base D, thevertically-adj ustable brackets A and A', the setscrews F and F foradjusting the brackets A and A' vertically, the base fm. on the bracketA, the set-screw K for adjusting the base 'm on the bracket A, thebearings M, secured to and movable endwise with the base fm, thebearings M', secured on the bracket A', the

spindles B and C, mountedl in the bearings In testimony whereof Weafxoursignatures M and M, respectively, and having` sandpa,- in presenceof tWo Witnesses.

pering-heads on their opposing ends, the spin- JOSEPH vFELIX RODGERS.dle C movable With the bearings M and the LUCAS JOHN GREGOR.

5 base m, the Work-rest O, and the set-screws Witnesses:

'n lnfor vertically adjusting the Work-rest, sub- JOHN A.v CAMPBELL,

stantially as described. R. M. SPEER.

